chemistry

Polyane

Polyane is a chemistry topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Polyane rather than just read about it. In short: Polyane is a French trademark for insulating and waterproof plastic films used in construction, registered in 1965. History Henri Piat, a mechanical enthusiast, collaborated with the owner of Société Plastique Soudé, J.-E.

Polyane — illustration

Key takeaways

Polyane belongs to chemistry; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Polyane to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Polyane from memory before moving on to harder problems.

Reference excerpt

Polyane is a French trademark for insulating and waterproof plastic films used in construction, registered in 1965.

History Henri Piat, a mechanical enthusiast, collaborated with the owner of Société Plastique Soudé, J.-E. Mazuyer and started a new company, Company of Transformation of Synthesis Products, later known as Prosyn. Due to high investment cost, early technical challenges and expensive import licenses, the company struggled. After some time, the company moved to the station Châteaucreux in Saint-Etienne. After a downturn, in 1964, the company Société Nationale des Pétroles d'Aquitaine (SNPA), part of the Rhône-Alpes CRRA Research Centre, took a co-stake in Prosyn, with Lafarge. The two companies had different applications in mind; Lafarge aimed to improve the waterproofing of its cement bags, while SNPA aimed to develop and promote the use of polyethylene films. As part of these activities, Prosyn moved to Saint-Chamond. After significant growth in the 60s and 70s, SNPA took over the entire capital of Prosyn and in the 1980s, the Société Nationale des Pétroles d'Aquitaine became the Elf Atochem group. Prosyn was then renamed to Prosyn Polyane, which combined with a marketing campaign led to the brand name, Polyane, in 1965. Products in which Polyane is used include stretch film, garbage bags and printing on plastic film, among other more niche applications. In 1999, Prosyn Polyane had profitability issues and Elf Atochem aimed to sell off the brand and facilities. A successful sale was made to the Luxembourgian industrial group Verdoso, which also held a majority of the capital of Société de Production de Films Plastiques (SPFP). Prosyn Polyane was integrated into this organization. This re-oriented Prosyn Polyane to focus on the manufacture of film for industry and agriculture. The company was bought again in October 2001 by the Adelpro group, a specialist in agricultural film, which also held two former competitors: Addem Plastiques (Firminy, Loire) and the former agricultural division of the British group Autobar Flexible France, which was then called Deltalène (Sainte Sigolène, Haute-Loire). Prosyn Polyane was subsequently renamed to Polyane. In July 2003, the group acquired Ribeyron (Sainte Sigolène, Haute-Loire). The court of Saint-Étienne stopped activities of Adelpro, after it continued to struggle. Parts were sold to Ribeyron SAS, but the court allowed Deltalène and Polyane to fuse to a new company that continued operations under the name Prolène. The company remained under observation by a judicial agent and was ordered to wait for the court's agreement for each of its purchases. It was unable to remove itself from the verge of bankruptcy and under consultation of the court, Plastika Kritis purchased the failing companies. These were subsequently combined into a new company, Agripolyane, which holds the Polyane brand. The brand has since become widespread and is often used as a generic term to refer to specific types of plastics rather than the brand itself.

Patents and trademarks The Polyane trademark was registered in 1965. Since then, the company has changed its name from Prosyn Polyane to Agripolyane. It has also diversified its activity to include agriculture, construction, industry and geomembrane. The company wanted to protect its name by registering several dozen trademarks that it has created in its main markets, both nationally and internationally, with organizations specialized in intellectual property such as the INPI (France) or the OHIM (European Union). The company has also developed new products and filed patents to protect its innovations.

References

External links Official website

Illustrations

Worked examples

Example 1 — a first encounter with Polyane

Start with the simplest possible case. Write down what Polyane claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In chemistry, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Polyane before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Polyane ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Polyane

In research: Polyane appears in chemistry research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Polyane in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Polyane is common in secondary-school and first-year university syllabi. It links to neighbouring topics Brand name materials, Polymers, so understanding it makes those chapters shorter.
In everyday life: Look for Polyane outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Polyane in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Polyane means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Polyane out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Polyane in simple terms?

Polyane is a French trademark for insulating and waterproof plastic films used in construction, registered in 1965. History Henri Piat, a mechanical enthusiast, collaborated with the owner of Société Plastique Soudé, J.-E.

Why does Polyane matter?

Because it connects several chemistry ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Polyane?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Polyane.